ATAM862 datasheet(56/110 Pages) ATMEL

56 / 110 page

4554E–4BMCU–05/06

ATAM862-3

Table 22-10. Timer 2 Output Select Bits

If one of these output modes is used the T2O alternate function of Port 4 must also be activated.

22.12.5

Timer 2 Compare and Compare Mode Registers

Timer 2 has two separate compare registers, T2CO1 for the 4-bit stage and T2CO2 for the 8-bit

stage of Timer 2. The timer compares the contents of the compare register current counter value

and if it matches it generates an output signal. Dependent on the timer mode, this signal is used

to generate a timer interrupt, to toggle the output flip-flop as SSI clock or as a clock for the next

counter stage.

In the 12-bit timer mode, T2CO1 contains bits 0 to 3 and T2CO2 bits 4 to 11 of the 12-bit com-

pare value. In all other modes, the two compare registers work independently as a 4- and 8-bit

compare register.

When assigned to the compare register a compare event will be suppressed.

Output Mode

T2OS2

T2OS1

T2OS0

Clock Output

Toggle mode: a Timer 2 compare match toggles the

output flip-flop (M2) -> T2O

Duty cycle burst generator 1: the DCG output signal

(DCG0) is given to the output and gated by the output

flip-flop (M2)

Duty cycle burst generator 2: the DCG output signal

(DCGO) is given to the output and gated by the SSI

internal data output (SO)

Biphase modulator: Timer 2 modulates the SSI

internal data output (SO) to Biphase code

Manchester modulator: Timer 2 modulates the SSI

internal data output (SO) to Manchester code

SSI output: T2O is used directly as SSI internal data

output (SO)

PWM mode: an 8/12-bit PWM mode

Not allowed

ATAM862 датащи(PDF) 56 Page - ATMEL Corporation